messages.js: Get better function names in stack traces.

test/mjsunit/stack-traces.js

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 93 matching lines @@
 };
 
 function testDefaultCustomError() {
   throw new CustomError("hep-hey", undefined);
 }
 
 function testStrippedCustomError() {
   throw new CustomError("hep-hey", CustomError);
 }
 
+MyObj = function() { FAIL; }
+
+MyObjCreator = function() {}
+
+MyObjCreator.prototype.Create = function() {
+  return new MyObj();
+}
+
+function testClassNames() {
+  (new MyObjCreator).Create();
+}
+
 // Utility function for testing that the expected strings occur
 // in the stack trace produced when running the given function.
 function testTrace(name, fun, expected, unexpected) {
   var threw = false;
   try {
     fun();
   } catch (e) {
     for (var i = 0; i < expected.length; i++) {
       assertTrue(e.stack.indexOf(expected[i]) != -1,
                  name + " doesn't contain expected[" + i + "] stack = " + e.stack);
@@ skipping 123 matching lines @@
      " at Outer (res://outer-eval:1:37)"]);
 testTrace("testValue", testValue, ["at Number.causeError"]);
 testTrace("testConstructor", testConstructor, ["new Plonk"]);
 testTrace("testRenamedMethod", testRenamedMethod, ["Wookie.a$b$c$d [as d]"]);
 testTrace("testAnonymousMethod", testAnonymousMethod, ["Array.<anonymous>"]);
 testTrace("testDefaultCustomError", testDefaultCustomError,
     ["hep-hey", "new CustomError"],
     ["collectStackTrace"]);
 testTrace("testStrippedCustomError", testStrippedCustomError, ["hep-hey"],
     ["new CustomError", "collectStackTrace"]);
+testTrace("testClassNames", testClassNames,
+          ["new MyObj", "MyObjCreator.Create"], ["as Create"]);
 testCallerCensorship();
 testUnintendedCallerCensorship();
 testErrorsDuringFormatting();
 
 testTraceNativeConversion(String);  // Does ToString on argument.
 testTraceNativeConversion(Number);  // Does ToNumber on argument.
 testTraceNativeConversion(RegExp);  // Does ToString on argument.
 
 testTraceNativeConstructor(String);  // Does ToString on argument.
 testTraceNativeConstructor(Number);  // Does ToNumber on argument.
 testTraceNativeConstructor(RegExp);  // Does ToString on argument.
 testTraceNativeConstructor(Date);    // Does ToNumber on argument.
 
 // Omitted because QuickSort has builtins object as receiver, and is non-native
 // builtin.
 testOmittedBuiltin(function(){ [thrower, 2].sort(function (a,b) {
                                                      (b < a) - (a < b); });
                    }, "QuickSort");
 
 // Omitted because ADD from runtime.js is non-native builtin.
 testOmittedBuiltin(function(){ thrower + 2; }, "ADD");